Well, the cautious part of my cautious optimism about our car turned out to be more accurate than the optimism part, as it refused to start after having a couple of days to drain the battery. It spent the night at the mechanic: He found a problem with a dome light that stayed on when the door was closed, but he's not sure that's the entirety of the problem (and I'm pretty sure he's right that it isn't), so he's taking some more time to suss it out.